Automatic fire-extinguishing apparatus.



E. L THOMPSON.

AUTOMATIC FIRE EXTINGUISHING APPARATUS.

APPLICATION mm an. n. 1914.

1,287,800. Patented Dec. 17, 1918.

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UNITED STATES PATENT OFFICE.

EVERETT L. THOMPSON, 0]? DOVER, NEW JERSEY, ASSIGNOR TO SYPHO-CHEMICALSPRINKLER CORPORATION, OF CROTON-ON-HUDSON, NEW YORK, A CORPORATION OFNEW YORK.

AUTOMATIC FIRE-EXTINGUISHING APPARATUS.

Application filed April 17, 1914.

To all whom it may concern:

Be it known that I, EVERETT L. THOMPSON, a citizen of the United States,and resident of Dover, Morris county, State of New Jersey, have made acertain new and useful In vention Relating to AutomaticFire-Extinguishing Apparatus, of which the following is a specification,takenin connection with the accompanying drawing, which forms part ofthe same.

This invention relates especially to automatic fire extinguishingapparatus in which the distributing system may comprise automaticsprinkler heads, hose connections or other distributing devices and ispreferably provided with a priming or actuating tank which together withthe distributing system itself may normally contain Water or othernon-freezing extinguishing liquid for low temperature work. Underemergency conditions additional extinguishing liquid may be supplied tothe distributing system by any suitable liquid supply, such as anautomatic chemical supply tank which may have its chemical mixingdevices located within the tank itself if desired so as to Supply theextinguishing liquid under high pressure through a supply connectionbetween the tank and the distributing system which preferably has acheck valve and may also be provided with an automatically closingventing drain device located between two check valves or the like. Byproviding suitable connection between the upper part of the distributingsystem or actuating tank and the chemical supply tank or supplyconnection therefrom the suction or pressure I reduction automaticallycaused under emergency conditions of the system may actuate the chemicalmixing devices, and if desired additional supplies of extinguishingliquid may be furnished to the distributing system by a steamerconnection or other non-automatic supplemental liquid supplycommunicating with the system through a suitable check valve or thelike.

The accompanying drawing shows in a somewhatdiagrammatic wayillustrative embodiments of this invention in elevation, parts beingshown in section to more clearly indicate their construction.

The distributing system may be of any desired type and may asindicatedcomprise one or more risers or supply pipes 1 to which.-

Specification of Letters Patent.

Patented Dec. 1'7, 1918. Serial No. 832,518.

may be connected various distributing pipes such as 2, on whichautomatic sprinkler heads or distributing devices 3 may be arranged atsuitable intervals and the system may also comprise other distributingdevices such as the hose connection 5 to which hose lines may beconnected and operated when the valve 4 is opened. A suitable actuatingor priming supply tank may in many cases be connected to any suitablepart of the distributing system when a wet pipe type of distributingsystem is used so as to normally maintain the desired amount ofextinguishing liquid in the system. The actuating tank is preferably inany case large enough to supply the liquid required to compensate forany slight accidental leakage in the system and also in many cases maywith advantage be of sufficient capacity to furnish an initial supply ofextinguishing liquid when the system first gets into action in the eventof fire for which purpose it is.sometimes desirable to have this supplytank initially under considerable air pressure where a more forcibledischarge of the extin uishing liquid is desired. The desired hea mayhowever, be readily secured by the action 0 gravity when the upper partof the distributing system with or without the actuating or primingsupply tank, such as 6, is carried up suiiiciently beyond thedistributing devices and in such an arrangement as is diagrammaticallyillustrated in the drawing it is usually desirable to provide inconnection with'the top of the tank or adjacent parts of thedistributing system a suitably reduced venting device normally having apin hole or reduced venting passage for the slow escape or ingress ofair caused by ordinary temperature changes, and so forth. The ventingpassage 8 may be used in this connection and may be controlled by theventing valve 9 preferably of the needle valve type so as to be normallyentirely shut or preferably nearly closed to give the desired normalreduced venting passage and which may be readily opened to allow themore free venting of air through the venting passage 8 when filling theactuating tank and other parts of the distributing system in the firstplace with the water or other aqueous extinguishing liquid 7 such as asuitable solution of soluble and substantially inert salts to reduce thefreeaing point of the liquid for low temperature work which shouldpreferably be so selected as to be substantially inert or neutral to theother extinguishing liquids employed in connection with the system.

Under emergency conditions when one or more of the automatic sprinklerheads open or when the other distributin devices are brought into playthe cxtinguishin liquid in the system is instantly available for puttingout the fire and the discharge of this liquid involves the withdrawal ofliquid from the substantially closed upper portion of the distributingsystem which may include the actuating tank so as to cause a decidedpressure reduction or suction therein. Any suitable emergency devicesmay be used in connection with the actuating tank or connected parts forautomatically supplying additional extinguishing liquid to the system orfor alarm purposes or both, and these emergency devices may be locatedat any convenient point and may be connected with the actuating tank orconnected parts in which the pressure reduction takes place in anysuitable way, as for instance, by the suitable actuating or suctionconnection or pipe 10 which is preferably connected to the distributingsystem above the normal liquid level therein so that the air or otherfluid in this suction connection more readily transmits the suction orpressure impulse.

Any supplemental fluid supply for the distributing system, such as anypressure actuated automatic supplemental liquid supply may be used tosupply additional extinguishing fluid under emergency conditions. Achemical pressure actuated arrangement is shown in the drawing ascomprising a chemical supply tank 10 which may be connected with thedistributing system in any suitable way, this supply connection beingpreferably thou 11 not necessarily of an automatic ventin c aracter soas to prevent or minimize mixture of the liquid in the distributingsystem and the liquid used in the chemical supply tank. The supplyconnection 11 may be used with advantage to connect the chemical orother press sure operated supply tank with the cooperating distributingsystem and may comprise any suitable cut-off or check valve such as 13,between the distributing system and supply tank and may also if desiredcomprise any suitable automatic venting drain device between the valveand tank. As indicated this venting device 31 may comprise the ball dripcasing 35 in which the ball valve 14 may normally rest in a suitableseat or repression between the stop pin 34 and the conical valve seat 15so as to normally leave free the venting opening 36 for the escape ofair or other material. Under emergency conditions, however, when fluidis discharged in considerable quantities the ball valve 14: is therebycarried against the seat 15 tightly closing this small drip openingwhich for clearness is shown considerably enlarged. It is usuallydesirable where such a venting or drain device is used in the supplyconnection between the distributing sys tem and the point where thesuction connection communicates with the supply connection or with theconnected supply tank, to have one or more suitable cut-off valvedevices controlling the communication between the venting device and theconnection with the tankanddistributing system. The supply connectionmay have a depending portion, such as 18, extending within the supplytank, so that its receiving end .19 is adjacent the bottom of the tankwhere if desired it may be provided with a suitable strainer, such as19, of wire gauze or the like. If desired also a pin hole or reducedequalizing aperture may be formed in the supply connection inside thetank and preferably adjacent the top of the air space therein so as toallow for the equalizing fiow of any air or gases from time to time tocompensate for temperature changes without interfering with theemergency action of the apparatus. For this purpose the pipe 20 maycommunicate with the supply connection adjacent the top of the tank andbe provided with a diaphragm or the like 21 in which the pin hole orreduced equalizing aperture 22 may be formed, thus allowing a reducedopening between the air space of the supply tank and the supplyconnection. Any suitable chemical mixing devices may be used inconnection with the supply tank and the actuating members controllingthese mixing devices are preferably located within the tank itself asgenerally indicated in the Cooney Patents 1,075,015. 1,075,017 and1,075,018 of October 7, 1913. These actuating members within the tankmay comprise the actuating piston mounted within the cylinder 17communicating with or forming part of the supplying connection so thatthe piston is drawn toward the end of this cylinder when suction occursin the supply connection above and thus leave a substantially freepassage for the liquid up the extension 18 and into the supplyconnection 11 toward the distributing system. The suction connection orpipe 10 may be conveniently connected to the cylinder l'i' or to thesupply connection 11 at any convenient point so that under emergencyconditions the suction or pressure reduction caused by the withdrawal ofliquid from the upper part of the distributing system at once c'auses'acorresponding suction or pressure reduction on the piston 23 within thecylinder 17 so as to cause its emergency operation and effect theactuation of the pressure generating ele ments. One or more check valvesor cutofl' devices such as 12 should for most efi'ed communicates withtive operation be interposed in the supply connection between thedistributing system and the point where the suction connection thesupply connection so as to prevent any flow from the distribut ingsystem reducing its suction or actuating impulse. The supply tank maycontain a charge 29 of suitable carbonate liquid and the mixing devicesmay comprise thtipping acid container 26 carrying the charge 27 ofstrong sulfuric acid or the like and mounted by its trunnions 28 in thesupport 30 so that it normally tends to overturn when the actuatin stem24connected to the piston 23 is with rawn from the socket or member 25on the container.-

It is also desirable to arrange for a further supply of extinguishingliquid to the distributing system and it is advantageous to provide asuitable non-automatic supplemental liquid supply, such as a steamerconnection preferably extending outside of the building so that 'steamfire engines may con la their hose lines thereto and pump additionalsupplies of water into the dis tributing system in the event of fire.Such a steamer connection is shown as comprising the non-automaticsupply connection and the two communicating hose connections 32communicating with the distributing system throu h the automatic checkor cut-ofl valve 33 which prevents loss of extinguishing liquid in thesystem through this connection while instantly allowing any additionalsupplies of liquid to be pumped therethro g nto the distributing system.

This invention has been described in connection with a number ofillustrative embodiments, forms,-elements, materials, parts andarrangements, to the details of which disclosure the invention is not ofcourse to be limited, since what is claimed as new and what is desiredto be secured by Letters Patent is set forth in the appended claimswhich are of a somewhat limited character in view of the fact thatbroader claims to the use of an actuating tank or other substantiallyclosed upper portion of a distributing system and the connected suctionor actuating connection therewith are made in other applications such asSerial Nos. 799,840, filed November 8, 1913, 814,032 and 814,033, filedJanuary 24, 1914.

What is claimed is:

1. In automatic fire extinguishing apparatus, a distributing systemnormally charged with non-freezing extinguishing liquid and comprisingautomatic distributing devices including automatic sprinkler heads andhose connections, an actuating supply tinguishing liquid and connectedto the upper part of said distributing system. a reduced area ventingdevice connected to the upper part of said distributing system, the

' an automatic supplemental fluid supply tank containing a charge ofsaid exupper part of said distigbuting system being substantially loseduni er emergency conditions to permit a pressurechan'ge te take placetherein on the emergency operation of the system, anyautomaticsupplemental fluid supply for said distributing system comprising achemical supply tank, a supply connection between said chemical supplytank and said distributing system to supply additional extinguishingliquid thereto, chemical mixing devices cooperating with said supplytankand comprising a tipping acid container and actuating memberscomprising an actuating plston arranged in a cylinder formed in saidsupply connection and located within said tank, a suction connectionbetween the air space in the upper part of said distributing system andsaid supply connection adjacent said chemical supply tank and a checkvalve cut-ofi' device in said supply connection between said suctionconnection and said distributing system.

2. In automatic fire extinguishing apparatus, a distributing systemnormally charged with nonfreezing extinguishing liquid and comprisingautomatic distribut ing devices including automatic sprinkler heads, anactuating supplytank containing a charge of said extinguishing liquidand connected to the upper part of said distributing system, the upperpart of said distributing system being substantially closed underemergency conditions to permit a pressure change to take place thereinon the emergency operation of the systefm, or said distributing systemcomprising a chemical supply tank, a supply connection between saidchemical supply tank and said distributing system to supply additionalextinguishing liquid thereto, chemical mixing devices cooperating withsaid supply tank and comprising a tipping acid container and actuatingmembers comprising an actuating piston arranged in a cylinder formed insaid supply. connection and located within said tank, a suctionconnection between the air space in the upper part of said distributingsystem and said supplv connection adjacent. said chemical supply tank,and a checkvalve cut-oil device in said supply connection between saidsuction connection and said distributing system.

3. In automatic fire extinguishing apparatus, a distributing systemnormally charged with non-freezing extinguishing liquid and comprisingautomatic distributing devices including automatic sprinkler heads, theupper part of said distributing system being substantially closed undertank, a supply connection between said chemical supply tank and saiddistributing system to supply additional; extingulshing liquid thereto,chemical mixing devices coiiperating with said supply tan and comprisina tipping acid container and actuating mem ers located within said tankand connected with said supply connection, a suctionconnectioncontrolling said actuatmg system bein substantially closedunder emergency con itions to permit a pressure change to take placethereinon the emergenc operation of the system, an automatic suppementalfluid supply for said distributing system comprising a chemical supplytank, a supply connection between said chemical supply tank and saiddistributing system to suppl additionalextinguishing liquid thereto, cemical mixing devices cooperating withsaid supply tank and comprisingactuating members connected tosaid tank, a suction connection betweenthe u per part of said distributing system and d actuating members and acut-off device in said tion tem. s

5. In fire extinguishing apparatus, a distributing system normallycharged with extinguishing liquid and comprisin distributing devices,the upper part of sai distributing system being substantially closedunder emergency conditions to permit a pressure change to take placetherein on the emergency operation of the system, an automaticsupplemental fluid supply for said distributing system comprising achemical supply tank, a supply connection between said chemical supplytank and said distributing system to supply additional extinguishingliquid thereto, chemical mixing devices cooperating with said supplytank and comprising actuating members located within said tank andconnected with said sup ly connection, a suction connection controllingsaid actuating members and extending beconnection and said distributingsystween the upper part of said distributingsystem and said chemicalsupply connection and a cut-01f device in said supply connection betweensaid suction connection and said distributing system. c

6. In automatic fire extinguishing apparatus, a distributing systemnormally system to suppl supply connection between said succharged withnon-freezing extinguishing liquidand comprising automatic'd1stribut-.ing devices including automatic sprinkler heads, the upper part of saiddistributing system being substantially closed under emergencyconditions to permit a pressure change to take placeitherein on theemergency operation of the s stem, anautomatic supplemental fluid suppfyfor saiddistributing system comprising a chemical supply tank, a supplyconnection between said chemical supply tank and said distributingadditional extinguishing liquid thereto, c emical mixing devicescooperating with said supply tank and comprising a tipping acid.container and actuatmg members located within said tank, a suctionconnection controlling said actuating members and extending from the airspace in the upper part of said distributing system and a cut-ofl?device in said sup 1y connection between said suction connectlon andsaid distributing system.

7. In automatic fire extinguishing apparatus, a distributing systemnormally charged with extinguishing liquid and comprising automaticdistributing devices, the upper part of said distributing system be ingsu stantially closed under emergency conditions to permit a pressurechange to take place therein in the emergency operation of the system,an automatic supplemental fluid supply for said distributing systemcomprising a chemical sugplly tank, a supply connectlon between sai cemical supply tank and said distributing s stem to supply additionalextinguishing iquid thereto, chemical mixing devices coiiperatingwithsaid supply tank and com rising actuating members locatedwithin.said a suction connection controlling said actuattank,

ing members and extending from the upper system, and acutconnectionbetween and said distributpart of said distributing oif device in saidsupply said suction connection ing system.

y 8. In fire extinguishing apparatus, a distributing system normallycharged with extinguishing liquid and comprising distributingdevices,"the fupper art of said distributing system being su stantiallyclosed under, emergency conditions to permit a pressure change to takeplace therein on the emergency operation of the system, an automaticsupplemental fluid supply for said distributing system comprising achemical supply tank, a supply connection between said chemicalsupplytank and said distributing system to supply additional extinguishingliquid thereto, chemical mixing devices coiiperating with said andcomprising actuating devices located within said tank, a suctionconnection bebetween the upper part of said distributing system and saidactuating devices and a cutsupply tank naeaeoo ofi device in said supplyconnection between said suction connection and said distributing system.

9. In automatic sprinkler fire extinguish ing apparatus, a distributingsystem normally charged with extinguishing liquid and comprisingautomatic distributing devices including automatic sprinkler heads andhose connections, an actuating supply tank containing a charge of saidextinguishing liquid and connected to the upper part of saiddistributing system, a reduced area venting device connected to theupper part of said actuating tank, the upper part of said distributingsystem extending above the operating distributing device and being substantially closed under emergency conditions to permit a pressure changeto take place therein on the emergency operation of the system, anautomatic supplemental fluid supply for said distributing system, asupply connection between said supplemental fluid supply and saiddistributing system to supply additional extinguishing iquid thereto, asuction connection ontrolling said automatic supplemental fluid supplyand communicating with the air space in the upper part of saiddistributing system, a check valve cut-ofi' device in said supplyconnection between said suction connection and said distributing system,an automatically closing venting drain device in said supply connectionbetween said cut-ofl' device and said suction connection and a secondautomatic check valve cut-ofl' device in said supply connection betweensaid venting device and said suction connection.

10. In automatic fire extinguishing a paratus, a distributing systemnormal y charged with extinguishing liquid and comprising automaticdistributing devices, a reduced area venting device connected to theuppe part of said distributing system, the upper part of saiddistributing system extending above the operating distributing deviceand being substantially closed under emergency conditions to permit apressure change to take place therein on the emergency operation of thesystem, an automatic supplemental fluid supply forsaid distributingsystem, a supply connection between said supplemental fluid supply andsaid distributing system to supply additional extinguishing liquidthereto, a suction connection controlling said automatic supplementalfluid supply and communicating with the air space in the upper part ofsaid distributing system, an automatic check valve cutofi device in saidsupply connection between said suction connection and said distributingsystem, an automatically closing venting drain device in said supplyconnection between said cut-ofl' device and said suction connection anda second automatic check valve cut-ofl" device in said supply connectionbetween said venting device and said suction connection.

11. In automatic fire extinguishing apparatus, a distributing systemnormally charged with extinguishing liquid and comprising automaticdistributing devices, the upper part of said distributing systemextending above the operating distributing device and beingsubstantially closed under emergency conditions to permit a pressurechange to take place therein on the emergency operation of the system,an automatic supplemental fluid supply for said distributing system, asup-ply connection between said supplemental fluid supply and saiddistributing system to supply additional extinguishing liquid thereto, asuction connection controlling said automatic supplemental fluid supplyand communicating with the upper part of said distributing system andsaid automatic fluid sup-ply, an automatic check valve cut-off device insaid supply connection between said suction connection and saiddistributing system, a venting drain device in said supply connectionbetween said cut-off device and said suction connection and a secondautomatic check valve cutoff device in said supply connection betweensaid venting device and said suction connection.

12. In automatic fire extinguishing apparatus, a distributing systemnormally charged with extinguishing liquid and comprising automaticdistributing devices, the upper part of said distributing systemextending above the operating distributing device and beingsubstantially closed under emergency conditions to permit a pressurechange to take place therein on the emergency operation of the system,an automatic supplemental fluid supply for said distributing system, asupply connection between said supplemental fluid supply and saiddistributing system to supply additional extinguishing liquidthereto,actuating members communicating with said supply connection, asuction connection between the air space in the upper part of saiddistributing system and said actuating members, an automatic cut-ofi'device in said supply connection between said suction connection andsaid distributing system, a venting drain device in said supplyconnection between said cut-ofl' device and said suction connection anda second automatic cut-ofl' device in said supply connection betweensaid venting device and said suction connection.

13. In automatic fire extinguishing apparatus, a distributing systemnormally charged with extinguishing liquid and com-- prising automaticdistributing devices, the upper part of said distributing systemextending above the operating distributing device and beingsubstantially closed under emergency conditions to permit a pressurecharge to take place therein on the emergency operation of the system,an automatic supplemental fluid supply for said distributing system, asupply connection between said supplemental fluid supply and saiddistributing system to supply additional extinguishing liquid thereto,actuating members communicating with said supply connection, a suctionconnection between the upper part of said distributing system and saidactuating members and an automatic cut-off device in Said supplyconnection between said suction connection and said distributing system.

14. In fire extinguishing apparatus, a distributing system comprising anupper suction portion substantially closed under emergency conditionsand distributing devices including automatic sprinkler heads below saidsuction portion, non-freezing extinguishing liquid in said distributingsystem, an automatic supplemental fluid supply comprising a chemicalsupply tank communicating with said system and including actuatingmembers located in said tank, a Sun tion connection communicating withthe up per suction portion of said distributing system and automaticallyoperating said actuating members under emergency conditions to supplyadditional extinguishing fluid to said system and automatic cut-off andventing devices between said supplemental fluid supply and said system.

15. In fire extinguishing apparatus, a dis tributing system comprisingan upper suction port on substantially closed under emergency conditionsand distributing devices below said suction portion, non-freezingextinguishing liquid in said distributing system, an automaticsupplemental fluid sup ply comprising a chemical supply tankcommunicating with said system and including actuating members locatedin said tank and a suction connection communicating with the uppersuction portion of said distributing system and automatically operatingsaid actuating members under emergency conditions to supply additionalextinguishing fluid to said system.

16. In fire extinguishing apparatus, a distributing system comprising asuction portion in which a pressure reduction is produced underemergency conditions and dis tributing devices below said suctionportion, non-freezing extinguishing liquid in said distributing system,an automatic supplemental fluid supply comprising a chemical supply tankcommunicating with said system and including actuating members locatedin said tank and a suction connection communicating with the suctionportion of said distributing system and automatically operating saidactuating members under emergency conditions to supply additionalextinguishing fluid to said system.

17 In automatic fire extinguishing apparatus, a distributing systemnormally charged with non freezing extinguishing liquid and comprisingautomatic distributingdevices including automatic sprinkler heads, areduced area venting device connected to the upper part of said system,the upper part of said distributing system being substantially closedunder emergency conditions to permit a pressure change to take placetherein on the emergency operation of the system. an automaticsupplemental fluid supply for said distributing system comprising achemical supply tank, a supply connection between said chemical supplytank and said distributing system to supply additional extinguishingliquid thereto, chemical mixing devices cooperating with said supplytank and connected with said supply connection, a fluid actuatingconnection to actuate said supplemental fluid supply and extendingbetween the air space in the upper part of said distributing system andsaid supply connection adjacent Said chemical supply tank, anautomatically closing venting drain device in said supply connectionbetween said distributing system and said suction connection and cut-offdevices automatically opening toward said distributing system arrangedin said supply connection and normally closed on both sides at saiddrain device.

18. In automatic fire extinguishing apparatus, a distributing systemnormally charged with extinguishing liquid and comprising automaticdistributing devices, the upper part of said distributing system beingsubstantially closed under emergency conditions to permit a pressurechange to take place therein on the emergency operation of the system,an automatic supplemental fluid supply for said distributing systemcomprising a chemical supply tank, av supply connection between saidchemical supply tank and said distributing system to supply additionalextinguishing liquid thereto, chemical mixing devices cooperating !withsaid supply tank and connected with Said supply connection, a fluidactuating connection to actuate said supplemental fluid supply andextending between the upper part of said distributing system and saidsupply connection, an automatically closing venting drain device in saidsupply connection between said distributing system and said suctionconnectionand cut-off devices automatically opening toward saiddistributing system arrangedin said supply connection and normallyclosed on both sides of said drain de- V106. i

19. In "automatic fire extinguishing apparatus, a distributing systemnormally charged with extinguishing liquid and comprising distributingdevices, the upper part of said distributing system being substantiallyclosed tributing devices,

under emergency conditions to permit a pressure change to take placetherein on the emergency operation of the system, an automaticsupplemental fluid supply for said distributing system comprising asupply tank, a supply connection between said supply tank and saiddistributing system to supply additional extinguishing liquid thereto, afluid actuating connection to actuate said supplemental fluid supply andextend ng from the upper part of said distributing system, anautomatically closing venting drain device in said supply connectionbetween saiddistributing system and said suction connection and cut-ofl'devices automatically opening toward saiddistributing system arranged insaid supply connection and normally closed on both sides of said draindevice. Y

20. In automatic fire extinguishing apparatus, a distributing systemcomprising distributing devices, the upper part of said dis tributingsystem being substantially closed under emergency conditions to permit apressure change to take place therein on the emergency operation of thesystem, an automatic supplemental fluid supply for said distributingsystem comprising a supply tank, a supply connection between said supplytank and said distributing system to supply additional extinguishingliquid thereto, a fluid actuating connection to actuate saidsupplemental fluid supply'and extending from the upper part of saiddistributing system, a venting drain device in said supply connectionbetween said distributing system and said-suction connection andcut-ofi' devices automatically opening toward said distributing. systemarranged in said supply connection and normally closed on both sides ofsaid drain device.

21. In automatic fire extinguishing apparatus, a distributing systemcomprising disthe upper part of said distributing system beingsubstantially closed under emergency conditions to ermit a pressurechange to take placetherein on the emergency operation of the system, anautomatic supplemental fluid supply for said distributing system, asupply connection between said supplemental fluid supply and saiddistributin system to supply additional extinguishing liquid thereto, afluid actuating connection to actuate said supplemental fluid supply andextending from the upper part of said distributing system, a ventingdrain device in said supply connection between said distributing systemand said suction connection and cut-off devices automatically openintoward said distributing system arranged in said suppl connection andnormally closed on both si es of said drain device.

22. In automatic fire extinguishing apparatus, a distributing systemcomprising distributing devices, the upper part of said distributingsystem bein substantially closed under emergency con itions to permit apressure change to take lace therein on the emergency operation ol thesystem, an automatic supplemental fluid supply for said distributingsystem, a suppl connection between said supplemental fi uid supply andsaid distributing system to supply additional extinguishing liquidthereto, a

fluid actuating connection to actuate said supplemental fluid supply andextending from the upper part of said distributing system, a ventingdrain device in said supply connection between said distributing systemand said suctionconnection and check valves automatically opening towardsaid distributing system arranged in said, supply connection andnormally closed on both sides of said drain device.

23. In iire extinguishing apparatus, a distributing system comprisingdistributing devices, non-freezing extinguishing liquid in said system,an automatic fluid supply comprising a chemical supply tank, a supplyconnection between said sup lyi and said system to supply additionaextinguishing liquid thereto under emergency conditions, a suctionconnection between the upper por tion of said distributing system andsaid supply connection and mechanism controlled thereby to automaticallyoperate said fluid supply, a normally open drain device in said supplyconnection between said distributing system an said suction connectionand normally clo ed check-valves in said supply connection on bothsidesof said drain device and automatically opening toward said distributingsystem under emergency conditions.

24. In fire extinguishing apparatus, a distributing system comprisingdistributing devices, extinguishing liquid in said system, an automaticfluid supply comprising a chemical supply tank, a supply connection 110between said supply and said system to supply additional extinguishingliquid thereto under emergency conditions, a suction actuatingconnection communicating with the upper part of said distributing systemand 115 with said supply connection to automatically operate said fluidsupply, a normally open drain devicein said supply connection betweensaid distributing system and said suction connection, means to closesaid drain 120 device under emergency conditions and normally closedcut-ofl' devices in said supply connection on both sides of said draindevice and automatically opening toward said distributing system underemergency condi- 125 tlons.

25. In fire extinguishing apparatus, a distributing system comprisingdistributing dechemical supply tank, a supply connection between saidsupply and said system to supply additional extinguishing liquid theretounder emergency conditions, a suction actuating connection communicatingwith the upper part of said distributing system and with said su plyconnection to automatically operate said fluid supply, a normally opendrain device in said supply connection between said distributing systemand said suction connection and normally closed cut-01f devices in saidsupply connection on both sides of said drain device and automaticallyopening toward said distributing system under emergency conditions.

26. In fire extinguishing apparatus, a distributing system comprisingautomatic distributing devices, non-freezing extinguishing liquid insaid distributing system, an automatic fluid supply comprising achemical supply tank connected to said distributing system, means toautomatically operate said fluid supply under emergency conditions, asupply connection between said sup ply tank and said distributing systemto supply additional extinguishing liquid thereto, a normallv openventing drain device in said supply connection, means for automaticallyclosing said gency conditions and a normally closed cutoff device insaid supply connection between said drain device in said distributingsystem and automatically opening toward said distributing system.

27. In fire extinguishing apparatus, a distributing system comprisingdistributing devices, extinguishing liquid in said distributing system,an automatic fluid supply comprising a chemical supply tank, means tovsaid supply .under a supply connection automatically operate emergencyconditions, between said supply ing system to supply additionalextinguishing liquid thereto, a normally open drain device in saidsupplv connection and a normally closed cut-o device in said supplyconnection between said drain device in said distributing system andautomatically opening toward saiddistributing system.

EVERETT L. THOMPSON.

lVitnesses A. J. Rronaans, H. G. Moamrr.

drain device under emertank and said distribut- Corrections in LettersPatent No. i 287,800-

It is hereby oertifiedthat in Letters Patent No. 1,287,800, grantedDecember 17, 1918, upon the application of Everett L. Thompson, ofDover, New Jersey, f an improvement in Automatic Fire-ExtinguishingApparatus," errors appear i th printed specification requiringoorrection as follows: Pixga 5., lines 85-86, claim 11, strike out thewords i and said aiitomatic fluid supply page 6, line 1, claim 13, forthe word "charge" read change; and that the said Letters Patent shouldbe read with these oorrections therein that the same may conform to therecord of the casein the: Patent Ofiioa.

Signed and sealed this 25th day of February, A. D., 1919.

1*. W. H. CLAY,

Acting Omnmissimwr of Patents.

